After 2 kids, I can barely remember where my keys and cell phone are at all time. And I'm constantly calling my kids by names that do not belong to them. And I'm young. Very, very young.

Being young does not mean that your mind is sharper than an older person. I have met older people who could recite whole books.
That type of generalization is not fair. But I guess since Hillary is out of the race, the press doesn't have sexism to kick around anymore, so they giving ageism their best shot.